NTA Abhyas NEET2020BotanyCell Cycle and Cell DivisionPractice
Match the columns. Column I Column II P Zygotene i Chromosomes become gradually visible under the light microscope Q Diakinesis ii Bivalents clearly appear as tetrads R Pachytene iii Terminalisation of chiasmata S Leptotene iv Synapsis
Options
- AP - i v , Q - i i i , R - i i , S - i
- BP - i , Q - i i , R - i i i , S - i v
- CP - i i , Q - i i i , R - i v , S - i
- DP - i v , Q - i , R - i i i , S - i i
Correct answer
A. P - i v , Q - i i i , R - i i , S - i
Step-by-step solution
The Prophase I of Meosis I is further divide into 5 phases - Leptotene, Zygotene, Pachytene, Diplotene and Diakinesis. In the leptotene stage the compaction of chromosomes is continued and they become more visible under light microscope. Second stage is zygotene where chromosomes start pairing together and the process is called synapsis. These paired chromosomes are called homologous chromosomes. In the next phase of pachytene these bilvalent chromosomes now appear as tetrads. Pachytene is also characterized by the